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【单选题】
In the figure given below AB is the production-possibility curve of Canada. In the absence of trade, the price ratio is 1 bushel of wheat/bale of cotton as shown by the line PQ. The international price ratio is 0.25 bushels of wheat/bale of cotton as shown by the line RS. I 1 and I 2 are the pre-trade and the post trade community indifference curves of Canada respectively. In the absence of international trade, 1 bushel of wheat will exchange for _____ bale ( s ) of cotton in Canada . After Canada engages in international trade , 1 bushel of wheat will exchange for _____ bale ( s ) of cotton . Wheat (bushels) C otton (bales) Canada C 0 C 1 S 1 S Q 80 60 25 50 I 1 I 2 65 85 0 B A P R a. a. 1 ; 0.25 b. b. 4 ; 1 c. c. 1 ; 4 d. d. 0 ; 2.5
A.
B.
C.
D.
D
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【单选题】下列选项中哪一个不是G-菌外膜的组成成分
A.
脂多糖
B.
O-抗原
C.
磷壁酸
D.
LPS
E.
脂蛋白
【判断题】在正弦交流电路中,电阻两端的电压u增加时,流过它的电流i也随之增加。
A.
正确
B.
错误
【简答题】(P57) Exercise 3.mp4 Exercise 3: What do they do on their journey to work? A. Take in the (1) , the scenery, um ... and try to (2) in the road which are quite erous. B. Well, sometimes, if ... if...
【判断题】在正弦交流电路中,电阻两端、电感两端或电容两端的电压 u增加时,通过它的电流i也会增加。
A.
正确
B.
错误
【多选题】人体虱的形态特征与生活习性有 ( )
A.
B.
C.
D.
蜚蠊
E.
【单选题】西藏的国家历史文化名城不包括()。P165
A.
拉萨市
B.
日喀则市
C.
江孜县
D.
山南市
【单选题】Why Are There Only 28 Days in February?Thirty days hath September,April, June, and November.All the rest have 31,Except for February,Which got the short stick because it's cold and no one likes it.Wel...
A.
6
B.
8
C.
10
D.
12
【简答题】Monica: Phoebe! Rachel! It's Monica! I wonder what you could possibly need me for on such short 1 ! Rachel: Oh Monica, we are so sorry. Monica: For what? Rachel: Well first, for forgetting to throw yo...
【简答题】Well, it's so short; I don't actually do very much at all, apart from sure I don't have 6) ____________.
【单选题】以下关于IEEE802.11物理层对2.4GHz频段信道划分方法的描述中,错误的
A.
IEEE802.11物理层将2.4GHz频段划分为14个独立的信道
B.
信道1的fc1=2.412GHz,范围2.401~2.423GHz
C.
相邻的信道1与信道2之间频率没有重叠
D.
无线网络制造商一般采用信道1、6、11
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